Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stockholders' Equity - Summary of Stock Option Activity (Details)

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Note 4 - Stockholders' Equity - Summary of Stock Option Activity (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Options Outstanding (in shares) 1,632,662    
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 10.78    
Weighted- average remaining contractual life (Year) 6 years 146 days   5 years 36 days
Options Granted (in shares) 800,000 0  
Options Granted, Weighted Average Exercise Price (in dollars per share) $ 0.43    
Options Outstanding (in shares) 2,432,662   1,632,662
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 7.37   $ 10.78
Aggregate intrinsic value $ 19,040    
Options Exercisable (in shares) 1,795,786    
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 9.78    
Options Exercisable, Weighted Average Remaining Contractual Life (Year) 5 years 109 days    
Options Exercisable, Aggregate Intrinsic Value $ 5,712